Guide frame, tension sleeve and twisting copper sheathing are lubricated once per shift.
导向架和箍圈、扭转铜套，以上各点每班注油一次。
The tension swelling of the knee, high position of the patella and a sleeve fractured fragment in the distal patella may be the clues for establishment of a correct diagnosis.
张力性膝关节肿胀、高位髌骨和髌骨下套状骨块三大特征。
When the electric power lines fall onto the upper side, the high tension electricity can not pass through the insulation protective sleeve for the user lines, and the fatal accident can be avoided.
当有电力线跌落到上面时，高压电无法穿过下户线绝缘保护套，就可避免引起严重事故。
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